The Dark Lord and his followers were indeed put in Azkaban when the opportunity arose, but this was for their crimes in the way of murder and such, not for their intention to take over magical Britain.
Many Death Eaters were put in Azkaban, but Voldemort never was. Indeed, there's no evidence in canon that Azkaban has ever been used to hold a Dark Lord.
Also, and this has come up before although I forget whether it was in this specific thread, increasing the severity of punishments statistically tends not to result in a reduction in the rate of crimes, whereas increasing the certainty of punishment does. Creating a justice system on the assumption that criminals are good rationalists would be profoundly misguided.
Indeed, there's no evidence in canon that Azkaban has ever been used to hold a Dark Lord.
I suppose this depends on what we consider evidence. I would personally assign high credence to that based on 2 considerations:
1) that there have been quite a few Dark Lords, such that they are considered a generic natural category and are spoken of collectively; the Harry Potter wikia includes a list of 9 wizards/witches who don't appear in canon events, but I'm not sure on what basis they are listed. 2) the only other Dark Lord whose disposition we know of was put...
- This thread has run its course. You will find newer threads in the discussion section.
Another discussion thread - the fourth - has reached the (arbitrary?) 500 comments threshold, so it's time for a new thread for Eliezer Yudkowsky's widely-praised Harry Potter fanfic.
Most of the paratext and fan-made resources are listed on Mr. LessWrong's author page. There is also AdeleneDawner's collection of most of the previously-published Author's Notes.
Older threads: one, two, three, four. By tag.
Newer threads are in the Discussion section, starting from Part 6.
Spoiler policy as suggested by Unnamed and approved by Eliezer, me, and at least three other upmodders:
It would also be quite sensible and welcome to continue the practice of declaring at the top of your post which chapters you are about to discuss, especially for newly-published ones, so that people who haven't yet seen them can stop reading in time.